Skeleton tetrahedron for jetties and current deflectors



SKELETON TETRAH-EDRON FOR JETTIES AND CURRENT DEFLECTORS .'5 Sheets- Sheet l July 14, 1931. D. F. sHELDoN 1,814,495

sKLETou TETRAHEDRON FOR JETTIES AND CURRENT DEFLEoToRs Filed oct. 51, '192e s sheets-sheet 2 v ./)v y En Ton DAME/ fjHf/ Do/r DWT/V555 y @WF l "July YA14, 1931. D. F. SHE'LDN 1,814,495

SKELETON TETRAHEDRON FOR JETTIES AND CURRENT DEFLECTORS Filed Oct. .'51, 1928 3 Sheets-Sheet 5 Juri/7 ron .DA/WEL rj/fano# by, am P' @l-5%@ fra ggfllf* Patented July 14, 1931 DANIEL r.'slrIfELno1v,f or-f-MoN'rALvo; fcAL'IroRNIA sKEnn'roNf TETRAHEDRoNroR Jrrrrns anni: CURRENT DErLEo'roRs .Application `fil ec 1 V October 31,;1928n-"Serial: No. 316,125.

v This `invention relates :to improvements in devices of the 'character setforth inPatent No.. 1,149,140, granted .to myself. and. another, ;1\1ay;1 8,'1915; l ,j y

.l Under .said patent,'. tetrahedronskeletons ."ueI providedforplocaton Ainth-e bed. of a 'Stream'.for the purpose ofausng sand and ls'iltcarried `by. .-th e.stream to; deposit Where;

` required for; buildino-- up or. protecting the 10, banksand-or, ,straigh-tening`-the course ofthe stream.

Skeleton tetrahedronsfor-use for Ithepurpose set Afolthf .mustf be ,massive` and strong f, andare` made` fofg a metallic framework on 15 which concrete. isinolded yto form -thecorners .fandbeamsorlegs '.,Thereare various .objections to building sll'ch :structures .atthe .placesf-vvherc .they are to..be.f11sed,-asf.the .manufact-ure thereof can 20..,0I1ly'-beeconomicallycarried on ,the use of heavy; rmachinery t and ymore .satisfactory -vmrkhayV loe.y performed. at; a `.central plant orstation Where'machinery .for mXing and pouringthe concrete is provided,y andthe ma- 2.. Aserialsnecessary .for makingithejstructurecan tbe. assembledy ,conveniently butovving tojthe 1- great. ,Weight and unwieldy .character offthe individual units, .-itg is. vgeryy diflicult .to .transport the 'structures from., a .central place of 30.manufacture andlocate them atthep1aces of use. i i; An. .obj ect` Ofthis invention, isrto (provide a j practical. skeleton.,. tetrahcdron. adapted :for l,gmanuiacture, in. separat parts `that may be transported. independent y. of each .other to the 'p'lace'of userand to make provision Wherebysllch partsgmayibereadily. assembled and yfastened together, in set up form. at. the place `...'(jfuseand there.madeintointegral units. 4 0 Y AILOther4 .obj ect.. is. .to .produce a... stronger skeleton tetrahedron than heretofore; .and in ,carrying )ont .the invention I ,have provided:

reinforced concrete individual'part's compris; apex members ,and 4leg sections, xeach part t. .having` `seats complementaryl to seats. on. ,an- ,othen partand adapted tobejuxtaposedwhen the parts .are.assembled;i ,romnvhich .I ugrtaposedparts,the/reinforcements `[project 1 dnicomplementary arrangements; and I ,provide means whereby -juz'ztaposed reinforce projectionsof onefacemay be securedqto the reinforce .projections of. another face-,iso rthat 1 the..fapices andthe leg.. sections may .be separately moved from the place of manufacture ,to the. place of use and therehegsetrup and v fittedto eachother and secured-together, and finally completed byillingwith .concrete the openspaces surrounding jthe connected reinforcements at the joints. i

Anotherobjectof theyinvention is to securemaximum strength in acompositereinforced concrete skeletontetrahedron and particularlyto strengthen-the corner pieces, and dispose lthe parts to maximum, advantage of s anchoring efficiency.'

.-leatures of thenvention are-'also ,found l. inthe; yforms and.y arrangements of the reinforcing` rods and the eyes thereofvvhereby vthe ,st rengthpf. the corner .pieces is secured andyvvher-eby' git .isf made possible 4tok connect ther .corner Apiece .stubsvvith `the leg sections and thoroughly protect the, metal I connections at the joints. l f

advantage arising `from `this .invention is superionanchoring Weight andrstrength at the corners. f

- Qtherfohjects, advantages and features of invention---1nay appear ,from the accompanyingr-drawings', the subjoinedA detailedy descripytion and the appendedfclaims. v

r The. accompanying drawings `illustrate the fin-vention. i

yFigure lris a plan viewrot a skeleton tetra- Zghedron forming a jetty-unit constructed in .accordance Withthis invention'. j

Fig. 2 is a side View of the same. f Fig.3i.isA infront view;v I Y is an enlarged 'ragmentaldiagramt maticviewof one'ofvthe, leg sections.

Fig n 5; is an end; View of. the=leg section E" Fig. 6 tis a detail .V-ievvrof a set of thethir- {teenrodsioreach of thelfour corner pieces; the lhenti rods are shownV asstood up, and

-YWd in perspective;v -andonejoffthenine f .tie gbands for the three s tubsof each corner` ,piece 1 Itis understood-that .theftwo legs 3. oi.each,b ent.rodf are ofg-thefsame length; the left Legeinthe vewr'being .oreshnrtened by :the nature of the perspective.

Fig. 7 is a perspective View of a nest of the rods and the bands of a corner piece, all in the proper arrangement for cement pouring, the form for molding the cement not being shown, and the outline of the cement body and stubs of the corner piece being indicated by broken lines.

Fig. '8 is aii enlarged detail view looking at the'apex of one of the corner pieces,with stubs 'ready for connection with legs; the upper reinforcing rods being indicated in vbroken lines.

Figs. 9, 10 and 11 are end views respectively, of the three stubs shown in Fig. 8, showing the 'arrangement of the connecting eyes.

' Fig. 12 is a side view of a. corner piece detached, the disposition and arrangement of some of the reinforcing rods being shown in broken lines.

Fig-13 is a fragmental View showing an assembly at an unfinished joint between a leg member and one of its stubs.

Fig. 14 is a detail viewed at right angles to Fig.'13.

Fig. 15 is an elevation of a corner piece in section in a plane central to one of the stubs on line x15, Figs. 8 and 11.

' The skeleton tetrahedron is composed of four corner pieces or members 1, allfof which are alike, six leg sections 2, which are alike, and twelve joints 3, which are alike, connecting the leg sections to the stubs of the corner leg' pieces.

Each corner member, or apex comprises a junction body 4, a cap 5 and three divergent stubs 6, 7, 8, fiaring from a common apex or source and is composed of concrete with steel rod reinforcement. Each corner piece is reinforced by a nest assembly of tri-loop bent reinforcing rods b, a, a', a, d, e, c, 0', 0, o, b', criss-crossing each other at their intermediate loops within the junction body 4, (Fig.'7) forming a nest or frame formation inside the'corner piece, and having terminal bends forming open eyes 9b, 9a, Qa, 9a, 9d,

9e, 9c, 90', 90, 9b, 9b', projecting beyond the end faces 10 of the stubs free of the stubs,

and relatively arranged for alinenient to receive connecting pins 11, (Fig. 13) r,for holding the stubs and leg sections together in axial alinement.

From Fig. 7, it will be apparent, that the reinforcing rods Y), a, a, a, etc., comprise Vthe rigid framework which is used as a mount for the cement poured over and through the network or nest formed by the reinforcing rods. The reinforcing rod a of the stub member 9 extends longitudinally of such member and across the corner section 5. and extends through the length'of the stub meinber 8, terminating in the loop 9a. In like I mannerthe remaining rods disposed within the stubmemberQ, with the exception of the reinforcing rods f and g, extend the length of the stub 9 and project longitudinally of the stub member 8.

Similarly, the reinforcing rods c, c', b, b, extend the length of the stub 7 and across the corner 5 and project across the length of stub 8. As previously indicated, each of said rods terminate in loops extending below the surface 10. Tie wires i are preferably positioned along the frame workof the reinforcement rods to hold the latter in proper adjustment.

` The leg sections 2 are provided With rein forcing rods having straight bodies 12 and terminal eyes or looped portions 13, that project from the plain faces 14 of the ends of the leg members. The eyes at the ends of the stubs and leg sections are alike and are adapted and arranged to be juxtaposed to receive the pins 11 which are preferably in the form of bolts having nuts 15 to hold the pairs of juxtaposedV eyes together. There are eight parallel reinforcing rods (Fig. 5)- in each leg; yand said rods extend from end to end of the leg section and terminate at their opposite ends in the projecting eyes 13.

Each corner piece is provided with thirteen reinforcing rods e, d, a, a, a, b, f, g, 0, c', o, b b', and nine ties 71,.

There are seven forms of reinforcing rods in each corner piece, and the ties areformed of Wires or rods bent aroundV the parallel portions of the reinforcing rods in the stubs after the usual manner of banding vparallel reinforcing rods in reinforced concrete structures preparatory to pouring the concrete.

The eyes are in the form of loops which are economically made by bending the rod terminals to form a U bend, the base of which `Will protrude .beyond the end of the stub or the leg section a distance a little more than half the width of the gap required between the ends of the stub and leg at each joint delining the gap, to allow the constructor. to insert the pins 11 through thek loops and make them secure before filling the gap with concrete or other cementitious material to complete th'e reinforced oint. j

The body of the rod beyond the base of the 'loop is of suiiicient length to be embedded in the body of theleg or stub as the case may be whenthe same is molded at the place of manufacture. l A.

, From the foregoing description considered in connection with the accompanying drawings, it is believed that the several novel structural features of my present improvement, as well as the advantages thereof in practicalloperation, willbe readily appreciated.

Because of the simple form of the various elements entering into the describediconstruction, the device may be produced at comparatively small manufacturing cost.

I have described and illustrated in the accompanying drawings a structural embodiment of the device which I have found to give highly satisfactory results, and it will be obvious to those skilled in the art, after an understanding of my invention, that other changesand modifications may be made Without departing from the spirit and scope of my invention and I aim in the appended claims to cover such modifications as are Within the scope of my invention.

l. A corner member for a skeleton tetrahedron comprising divergent stubs flaring from a common source, each stub Vbeing provided With reinforced rods co-extensive the length thereof and terminating in spaced loops. l

2. A corner member comprising divergent stubs flaring from a common source, reinforcing rods extending longitudinally of a pair of contiguous stubs and across the corner member, and loops extending from said rods free of the stubs.

3. A corner member comprising contiguous divergent stubs, reinforcing rods connecting a pair of said stubs, loops projecting from sai-d rods free of said stubs, said rods comprising a nest frame formation under said corner.

In testimony whereof, I have hereunto set my hand at Ventura, California, this 22 day of October, 1928.

DANIEL F. SHELDON. 

